Valve bead type pneumatic valve pressure stabilizing device and experimental method

Abstract

The invention discloses a valve bead type pneumatic valve pressure stabilizing device and an experiment method in the technical field of pressure stabilizing experiments. The valve bead type pneumatic valve pressure stabilizing device comprises a hydraulic controller, a hydraulic actuator, a pressing piece, a pressing spring, a valve bead cap, a valve bead, a spraying pipe, a mounting frame, a high-pressure chamber, a pressure intensity sensor and a pipeline connector. A pressure sensor and a pipeline connector are arranged on the two sides of the high-pressure chamber, a spraying pipe and a mounting frame are arranged at the top of the high-pressure chamber, and a hydraulic actuator is arranged at the top of the mounting frame and electrically connected with the hydraulic controller; a pressing piece and a pressing spring are sequentially installed below the hydraulic actuator, and the top of the valve bead cap is sleeved with the bottom of the pressing spring. And the valve bead is arranged between the valve bead cap and the spray pipe. The valve bead type pneumatic valve pressure stabilizing device and the experiment method are simple in structure, convenient to machine and install and low in maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of voltage stabilization experiments, and in particular to a valve ball type pneumatic valve voltage stabilization device and an experimental method. Background Art

[0002] With the continuous development of aerospace science and technology, the demand for the development of high-performance and high-maneuverability engines has been proposed. However, some solid rocket engines have problems with unstable combustion, which are usually manifested as pressure drift, pulse triggering, and limit cycle oscillation. For high-energy solid propellants in the engine, their combustion characteristics under different working pressure conditions show significant differences, such as flame height, flame shape, combustion surface recession rate, heat release rate, etc. The above characteristic parameters in turn further affect the working stability of the engine. At present, solid propellant combustion experiments are mainly carried out under specific working pressures. However, the existing experimental equipment still has the problem that the internal pressure is increased with the release of gas from the combustion of solid propellants, and the release of overpressure gas cannot be accurately and efficiently adjusted dynamically, which induces a difference between the internal environmental pressure and the preset target pressure, resulting in the solid propellant combustion characteristic data obtained by the test not matching the expectations. Due to the above mismatch, although some solid propellants have carried out combustion stability test evaluation under specific working pressures, some rocket engine experiments still have unstable combustion problems to varying degrees, and there is a difference in consistency between the experiment and actual application. There is no relevant solution to the technical problem of precise control of ambient pressure in constant-pressure experiments of solid propellants; therefore, there is an urgent need to find effective solutions to solve the above problems. Summary of the invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide a valve ball type pneumatic valve pressure stabilizing device and experimental method to solve the technical problem of low precision of environmental pressure control in solid propellant combustion characteristics test under existing pressure stabilizing conditions. It has a simple structure, is easy to process and install, and has low maintenance cost. It can be customized according to the requirements of the test task, solving the problem of accurately controlling the environmental pressure in traditional pressure stabilizing experiments.

[0004] In order to achieve the above object, the technical solution of the present invention is as follows:

[0005] The present invention provides a valve ball type pneumatic valve pressure stabilizing device, comprising a hydraulic controller, a hydraulic actuator, a clamping plate, a clamping spring, a valve ball cap, a valve ball, a nozzle, a mounting frame, a high-pressure chamber, a pressure sensor and a pipeline interface; the pressure sensor and the pipeline interface are arranged on both sides of the high-pressure chamber, the nozzle and the mounting frame arranged outside the nozzle are arranged on the top of the high-pressure chamber, the hydraulic actuator is arranged on the top of the mounting frame, and the hydraulic actuator is electrically connected to the hydraulic controller; the clamping plate and the clamping spring are installed in sequence below the hydraulic actuator, and the bottom of the clamping spring is sleeved on the top of the valve ball cap; the valve ball is installed between the valve ball cap and the nozzle.

[0006] Furthermore, the high-pressure chamber is a hollow cylinder, including a high-pressure chamber main chamber and a high-pressure chamber top base arranged at the top center position of the high-pressure chamber main chamber; the pressure sensor and the pipeline interface are respectively provided on the two side walls of the high-pressure chamber main chamber, and the high-pressure chamber top base is a hollow boss shape, which is installed in cooperation with the nozzle.

[0007] Furthermore, the nozzle body is a classic Laval nozzle configuration, including a T-shaped nozzle base, which is installed in cooperation with the top base of the high-pressure chamber; the internal configuration of the nozzle includes a hemispherical nozzle expansion section, a cylindrical nozzle throat and a conical nozzle convergence section, and the nozzle convergence section is installed in cooperation with the valve ball.

[0008] Furthermore, the shape of the valve ball cap is an inverted T-shape, including a valve ball cap ball top, a valve ball cap base and a valve ball cap valve stem arranged on the upper part of the valve ball cap base; the clamping spring is sleeved on the upper part of the valve ball cap valve stem, the valve ball cap ball top is installed in cooperation with the valve ball, and the diameter of the valve ball cap base is the same as the outer diameter of the clamping plate.

[0009] Furthermore, the hydraulic actuator includes a hydraulic actuator body, a hydraulic shaft arranged below the hydraulic actuator body, and a circuit arranged above the hydraulic actuator body; the hydraulic actuator body is fixedly mounted on the mounting frame, the hydraulic shaft is installed in cooperation with the clamping plate, and the hydraulic actuator is connected to the hydraulic controller through the circuit.

[0010] Furthermore, the mounting frame is a hollow truss structure, including a mounting frame platform at the top, a plurality of mounting frame legs arranged at the bottom of the mounting frame platform, a plurality of evenly processed mounting frame scale lines arranged on the mounting frame legs, a plurality of periodically evenly distributed mounting frame exhaust grooves, a mounting frame base at the bottom, and a mounting frame base groove arranged inside the mounting frame base; the mounting frame base groove is a stepped concave cavity configuration, which is respectively installed in cooperation with the valve ball cap and the top base of the high-pressure chamber, the mounting frame platform is installed in cooperation with the hydraulic actuator body, and the mounting frame is equipped with the clamping plate, the clamping spring, the valve ball cap, the valve ball and the nozzle.

[0011] Furthermore, the compression plate is a thin cylindrical body, the compression plate is made of 45 steel, and the bottom of the compression plate is installed in cooperation with the compression spring.

[0012] The present invention also provides a valve ball type pneumatic valve pressure stabilization test method, comprising the following steps:

[0013] S1. Preparation for the pressure stabilization experiment of ball-type pneumatic valve;

[0014] S2. Experimental process of the pressure stabilization experiment of the ball-type pneumatic valve.

[0015] Furthermore, the S1 comprises the following steps:

[0016] S11. According to the target experimental pressure working range, design the clamping plate, clamping spring, valve bead cap, valve bead, nozzle, mounting frame and high-pressure chamber, and select the pressure sensor, hydraulic actuator and hydraulic controller of appropriate range;

[0017] S12. Assemble the components in S11 according to the valve ball type pneumatic valve pressure stabilizing device to form a valve ball type pneumatic valve pressure stabilizing device;

[0018] S13. Check the rationality of the assembly of the components of the valve ball type pneumatic valve pressure stabilizing device, the fit and air tightness between the valve ball, valve ball cap and nozzle, and the reliability of the compression of the compression spring to push the valve ball cap to move;

[0019] S14. Start the hydraulic actuator, control the position of the hydraulic shaft and the clamping plate through the hydraulic controller, fill the high-pressure gas source into the high-pressure chamber through the pipeline interface, and record the pressure-time curve of the pressure sensor;

[0020] S15. If there is leakage between the valve ball and the nozzle or the pressure cannot be stabilized at a certain expected value, repeat steps S11 to S14 until the internal pressure of the valve ball type pneumatic valve pressure stabilizing device is stabilized at a certain expected value and no leakage occurs.

[0021] Further, the S2 comprises the following steps:

[0022] S21. Adjust the movement stroke x of the hydraulic axis, the movement stroke corresponding value is determined by the mounting frame scale line, and construct the corresponding relationship between the movement stroke x of the hydraulic axis and the steady-state pressure p in the high-pressure chamber;

[0023] S22. Check and clean the ball-type pneumatic valve pressure stabilizing device, process and archive the experimental data, and complete the ball-type pneumatic valve pressure stabilizing test experiment.

[0024] By adopting the above technical solution, the present invention has the following advantages:

[0025] The present invention provides a valve ball type pneumatic valve pressure stabilizing device and an experimental method. Based on modular design thinking, by designing the size of the spherical valve ball and the valve ball cap and the nozzle configuration, a 0-20MPa wide pressure range pressure stabilizing experimental environment can be constructed according to experimental requirements, so that the environmental pressure can be matched with the expected experimental task, and an experimental basis can be provided for further testing of the combustion characteristics of solid propellants under a specific pressure environment; a set of hydraulic actuators, valve balls and auxiliary devices are adopted to achieve the goal of high-precision pressure dynamic regulation, with low cost and effective reduction of system complexity; by controlling the movement law of the hydraulic actuator and quantifying the correspondence between the movement stroke of the hydraulic shaft and the pressure, the pressure in the device can be pre-regulated and precisely regulated, thereby improving the accuracy, safety and reliability of the experiment; a valve ball type pneumatic valve pressure stabilizing device and an experimental method proposed by the present invention have a simple structure, are easy to process and install, and have low maintenance cost, can be customized according to the requirements of the test task, and solve the problem of accurately controlling the environmental pressure in traditional pressure stabilizing experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural cross-sectional view of a valve ball type pneumatic valve pressure stabilizing device of the present invention;

[0027] Figure 2 It is a structural cross-sectional view of a high-pressure chamber in a specific embodiment of the present invention;

[0028] Figure 3 It is a structural cross-sectional view of a nozzle in a specific embodiment of the present invention;

[0029] Figure 4 It is a structural cross-sectional view of a valve ball cap in a specific embodiment of the present invention;

[0030] Figure 5 It is a structural schematic diagram of a hydraulic actuator in a specific embodiment of the present invention;

[0031] Figure 6 It is a structural schematic diagram of a mounting frame in a specific implementation manner of the present invention;

[0032] Figure 7 It is a structural cross-sectional view of a mounting frame in a specific embodiment of the present invention;

[0033] Figure 8 is a curve of pressure variation over time in a specific embodiment of the present invention;

[0034] Fig. 9 It is a schematic diagram of the movement stroke change of the hydraulic actuator in a specific implementation manner of the present invention.

[0035] Figure markings: 1—hydraulic controller; 2—hydraulic actuator; 3—pressure plate; 4—pressure spring; 5—valve ball cap; 6—valve ball; 7—nozzle; 8—mounting frame; 9—high-pressure chamber; 10—pressure sensor; 11—pipeline interface; 2a—hydraulic shaft; 2b—hydraulic actuator body; 2c—line; 5a—valve ball cap ball top; 5b—valve ball cap base; 5c—valve ball cap stem; 7a—nozzle base; 7b—nozzle expansion section; 7c—nozzle throat; 7d—nozzle convergence section; 8a—mounting frame platform; 8b—mounting frame scale line; 8c—mounting frame leg; 8d—mounting frame exhaust groove; 8e—mounting frame base; 8f—mounting frame base groove; 9a—high-pressure chamber main chamber; 9b—high-pressure chamber top base. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is described in detail below in conjunction with the drawings in the specification. It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] like Figure 1As shown, the present invention provides a valve ball type pneumatic valve pressure stabilizing device, comprising a hydraulic controller 1, a hydraulic actuator 2, a clamping plate 3, a clamping spring 4, a valve ball cap 5, a valve ball 6, a nozzle 7, a mounting frame 8, a high-pressure chamber 9, a pressure sensor 10, and a pipeline interface 11; pressure sensors 10 and pipeline interfaces 11 are installed on both sides of the high-pressure chamber 9, a nozzle 7 and a mounting frame 8 arranged outside the nozzle 7 are installed in the center of the top of the high-pressure chamber 9, a hydraulic actuator 2 is fixedly installed on the top of the mounting frame 8, and the hydraulic actuator 2 is electrically connected to the hydraulic controller 1; a clamping plate 3 and a clamping spring 4 are installed in sequence below the hydraulic actuator 2, and the bottom of the clamping spring 4 is sleeved on the top of the valve ball cap 5; the valve ball 6 is installed between the valve ball cap 5 and the nozzle 7, and the fit between the valve ball 6 and the valve ball cap 5 and the nozzle 7 is determined by the distance that the hydraulic actuator 2 presses down the clamping plate 3, and the pressure in the high-pressure chamber 9 is regulated by the relative position between the valve ball 6 and the nozzle 7. According to the test requirements, the present invention can control the hydraulic actuator 2 through the hydraulic controller 1 to drive the compression spring 4 to apply downward pressure to the valve ball cap 5, adjust the fit between the valve ball 6 and the nozzle 7, and achieve relative stability of the internal pressure of the high-pressure chamber 9, thereby providing an experimental basis for further constant pressure experimental tests such as solid propellant combustion response and gas generator thrust control.

[0038] like Figure 2 As shown, the main body of the high-pressure chamber 9 is a hollow cylinder made of 30CrMnSiA. The high-pressure chamber 9 includes a high-pressure chamber main chamber 9a and a high-pressure chamber top base 9b arranged at the center of the top of the high-pressure chamber main chamber. A pressure sensor 10 is fixedly installed at the lower part of one side wall of the main chamber 9a, and a pipeline interface 11 is installed at the other side wall. The high-pressure chamber top base 9b is in a hollow boss shape and is installed in conjunction with the nozzle 7.

[0039] like Figure 3 As shown, the main body of the nozzle 7 is a classic Laval nozzle configuration, made of SiC ceramics, including a T-shaped nozzle base 7a, which is installed in conjunction with the high-pressure chamber top base 9b; the internal configuration of the nozzle 7 includes a hemispherical nozzle expansion section 7b, a cylindrical nozzle throat 7c and a conical nozzle convergence section 7d; wherein the nozzle expansion section 7d is installed in conjunction with the valve ball 6, and the two have the same diameter.

[0040] like Figure 4As shown, the valve ball cap 5 is in an inverted T shape and is made of SiC ceramics, including a valve ball cap spherical top 5a, a valve ball cap base 5b, and a valve ball cap stem 5c arranged on the upper part of the valve ball cap base 5b; a retractable compression spring 4 is installed above the valve ball cap stem 5c, the valve ball cap spherical top 5a is installed in conjunction with the valve ball 6, and the diameter of the valve ball cap base 5b is the same as the outer diameter of the compression sheet 3. Among them, the valve ball 6 is made of 95 zirconium oxide, the lower part of which is installed in conjunction with the nozzle 7, and the upper part is installed in conjunction with the valve ball cap spherical top 5a; the compression spring 4 is made of alloy spring steel, and its inner diameter is consistent with the outer diameter of the valve ball cap stem 5c, and the outer diameter is not greater than the diameter of the valve ball cap base 5b; the compression sheet 3 is installed in conjunction with the top of the compression spring 4.

[0041] like Figure 5 As shown, the hydraulic actuator 2 includes a hydraulic actuator body 2b, a hydraulic shaft 2a arranged below the hydraulic actuator body, and a line 2c arranged above the hydraulic actuator body; the hydraulic actuator body 2b is fixedly mounted on the mounting frame 8, the hydraulic shaft 2a is installed in conjunction with the clamping plate 3, and the hydraulic actuator 2 is connected to the hydraulic controller 1 via the line 2c.

[0042] like Figure 6 , Figure 7 As shown, the mounting frame 8 is a hollow truss structure made of 45 steel, including a mounting frame platform 8a on the top, a plurality of mounting frame legs 8c arranged at the bottom of the mounting frame platform 8a, a plurality of evenly processed mounting frame scale lines 8b arranged on the mounting frame legs, a plurality of periodically evenly distributed mounting frame exhaust grooves 8d, a mounting frame base 8e at the bottom and a mounting frame base groove 8f arranged inside the mounting frame base; the mounting frame base groove 8f is a stepped concave cavity configuration, which is respectively installed in conjunction with the valve ball cap 5 and the top base 9b of the high-pressure chamber, the mounting frame platform 8a is installed in conjunction with the hydraulic actuator body 2b, and the mounting frame 8 is equipped with a clamping plate 3, a clamping spring 4, a valve ball cap 5, a valve ball 6 and a nozzle 7.

[0043] The main body of the clamping plate 3 is a thin cylindrical body made of 45 steel, and its outer diameter is the same as the diameter of the valve ball cap base 5b; the upper part of the clamping plate 3 is installed in cooperation with the hydraulic shaft 2a, the hydraulic actuator 2b is connected to the hydraulic controller 1 through the line 2c, and the hydraulic actuator body 2b is fixedly installed on the mounting frame 8.

[0044] The present invention also provides a valve ball type pneumatic valve pressure stabilization test method, comprising the following steps:

[0045] S1. Preparation for the pressure stabilization experiment of ball-type pneumatic valve;

[0046] Among them, S1 includes the following specific steps:

[0047] S11. According to the target experimental pressure working range, design the components such as the compression plate 3, the compression spring 4, the valve ball cap 5, the valve ball 6, the nozzle 7, the mounting frame 8 and the high-pressure chamber 9, and select the pressure sensor 10, the hydraulic actuator 1 and the hydraulic controller 2 of the appropriate range to ensure the reasonable installation size;

[0048] S12. Assemble the components in S11 according to the valve ball type pneumatic valve pressure stabilizing device to form a valve ball type pneumatic valve pressure stabilizing device;

[0049] S13. Check the rationality of the assembly of the components of the valve ball type pneumatic valve pressure stabilizing device, the fit and air tightness between the valve ball 6, the valve ball cap 5, and the nozzle 7, and the reliability of the compression spring 4 to push the valve ball cap 5 to move;

[0050] S14. Start the hydraulic actuator 2, control the position of the hydraulic axis and the clamping plate 3 through the hydraulic controller 1, fill the high-pressure gas source into the high-pressure chamber 9 through the pipeline interface 11, and record the pressure-time curve of the pressure sensor 10 as shown in Figure 8 As shown;

[0051] S15. If there is leakage between the valve ball 6 and the nozzle 7 or the pressure cannot be stabilized at a certain expected value, repeat steps S11 to S14 until the internal pressure of the valve ball type pneumatic valve pressure stabilizing device is stabilized at a certain expected value and no leakage occurs.

[0052] S2. Experimental process of the pressure stabilization experiment of the ball-type pneumatic valve.

[0053] S2 includes the following specific steps:

[0054] S21. Adjust the movement stroke x of the hydraulic axis 2a. The corresponding value of the movement stroke is determined by the mounting frame scale line 8b. When the movement stroke is x1, the specific value is as follows. Fig. 9 As shown in (a), high-pressure gas is continuously charged into the high-pressure chamber 9 through the pipeline interface 11. When obvious leakage occurs at the valve ball 6 and the nozzle 7 and the pressure recorded by the pressure sensor 10 no longer increases, the corresponding steady-state pressure p1 is recorded; when the movement stroke of the hydraulic shaft 2a increases to x2, as shown in FIG. Fig. 9 As shown in (b), the inflation flow rate is continued to increase until obvious air leakage occurs between the valve ball 6 and the nozzle 7 and the pressure recorded by the pressure sensor 10 no longer increases, and the corresponding steady-state pressure p2 is recorded at this time; the rest of the movement stroke is deduced in the same way, and the corresponding relationship between the movement stroke x of the hydraulic shaft and the steady-state pressure p in the high-pressure chamber is constructed;

[0055] S22. Check and clean the ball-type pneumatic valve pressure stabilizing device, process and archive the experimental data, and complete the ball-type pneumatic valve pressure stabilizing test experiment.

[0056] Finally, it should be pointed out that although the present invention has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate the present invention and are not used as limitations on the present invention. Various equivalent changes or substitutions can be made without departing from the concept of the present invention. Therefore, as long as the changes to the above embodiments are within the scope of the essential spirit of the present invention.

Claims

1. A valve ball type pneumatic valve pressure stabilizing device, characterized in that: It includes a hydraulic controller, a hydraulic actuator, a clamping plate, a clamping spring, a valve ball cap, a valve ball, a nozzle, a mounting bracket, a high-pressure chamber, a pressure sensor and a pipeline interface; the pressure sensor and the pipeline interface are arranged on both sides of the high-pressure chamber, the nozzle and the mounting bracket arranged outside the nozzle are arranged on the top of the high-pressure chamber, the hydraulic actuator is arranged on the top of the mounting bracket, and the hydraulic actuator is electrically connected to the hydraulic controller; the clamping plate and the clamping spring are installed in sequence below the hydraulic actuator, and the bottom of the clamping spring is sleeved on the top of the valve ball cap; the valve ball is installed between the valve ball cap and the nozzle.

2. A valve ball type pneumatic valve pressure stabilizing device according to claim 1, characterized in that: The high-pressure chamber is a hollow cylinder, including a high-pressure chamber main chamber and a high-pressure chamber top base arranged at the center position of the top of the high-pressure chamber main chamber; the pressure sensor and the pipeline interface are respectively provided on the two side walls of the high-pressure chamber main chamber, and the high-pressure chamber top base is a hollow boss shape, which is installed in conjunction with the nozzle.

3. A valve ball type pneumatic valve pressure stabilizing device according to claim 2, characterized in that: The nozzle body is of a classic Laval nozzle configuration, including a T-shaped nozzle base, which is installed in cooperation with the top base of the high-pressure chamber; the internal configuration of the nozzle includes a hemispherical nozzle expansion section, a cylindrical nozzle throat and a conical nozzle convergence section, and the nozzle convergence section is installed in cooperation with the valve ball.

4. A valve ball type pneumatic valve pressure stabilizing device according to claim 3, characterized in that: The shape of the valve ball cap is an inverted T-shape, including a valve ball cap ball top, a valve ball cap base and a valve ball cap valve stem arranged on the upper part of the valve ball cap base; the clamping spring is sleeved on the upper part of the valve ball cap valve stem, the valve ball cap ball top is installed in cooperation with the valve ball, and the diameter of the valve ball cap base is the same as the outer diameter of the clamping plate.

5. A valve ball type pneumatic valve pressure stabilizing device according to claim 4, characterized in that: The hydraulic actuator includes a hydraulic actuator body, a hydraulic shaft arranged below the hydraulic actuator body, and a circuit arranged above the hydraulic actuator body; the hydraulic actuator body is fixedly mounted on the mounting frame, the hydraulic shaft is installed in cooperation with the clamping plate, and the hydraulic actuator is connected to the hydraulic controller via the circuit.

6. A valve ball type pneumatic valve pressure stabilizing device according to claim 5, characterized in that: The mounting frame is a hollow truss structure, including a mounting frame platform at the top, a plurality of mounting frame legs arranged at the bottom of the mounting frame platform, a plurality of evenly processed mounting frame scale lines arranged on the mounting frame legs, a plurality of periodically evenly distributed mounting frame exhaust grooves, a mounting frame base at the bottom and a mounting frame base groove arranged inside the mounting frame base; the mounting frame base groove is a stepped concave cavity configuration, which is respectively installed in cooperation with the valve ball cap and the top base of the high-pressure chamber, the mounting frame platform is installed in cooperation with the hydraulic actuator body, and the mounting frame is equipped with the clamping plate, the clamping spring, the valve ball cap, the valve ball and the nozzle.

7. A valve ball type pneumatic valve pressure stabilizing device according to claim 5, characterized in that: The clamping plate is a thin cylindrical body, the material of the clamping plate is No. 45 steel, and the bottom of the clamping plate is installed in cooperation with the clamping spring.

8. A ball-type pneumatic valve pressure stabilization test method, characterized in that: The following steps are involved: S1. Preparation for the pressure stabilization experiment of ball-type pneumatic valve; S2. Experimental process of the pressure stabilization experiment of the ball-type pneumatic valve.

9. A ball-type pneumatic valve pressure stabilization test method according to claim 8, characterized in that: The S1 comprises the following steps: S11. According to the target experimental pressure working range, design the clamping plate, clamping spring, valve bead cap, valve bead, nozzle, mounting frame and high-pressure chamber, and select the pressure sensor, hydraulic actuator and hydraulic controller of appropriate range; S12. Assemble the components in S11 according to the valve ball type pneumatic valve pressure stabilizing device to form a valve ball type pneumatic valve pressure stabilizing device; S13. Check the rationality of the assembly of the components of the valve ball type pneumatic valve pressure stabilizing device, the fit and air tightness between the valve ball, valve ball cap and nozzle, and the reliability of the compression of the compression spring to push the valve ball cap to move; S14. Start the hydraulic actuator, control the position of the hydraulic shaft and the clamping plate through the hydraulic controller, fill the high-pressure gas source into the high-pressure chamber through the pipeline interface, and record the pressure-time curve of the pressure sensor; S15. If there is leakage between the valve ball and the nozzle or the pressure cannot be stabilized at a certain expected value, repeat steps S11 to S14 until the internal pressure of the valve ball type pneumatic valve pressure stabilizing device is stabilized at a certain expected value and no leakage occurs.

10. A ball-type pneumatic valve pressure stabilization test method according to claim 8, characterized in that: The S2 comprises the following steps: S21. Adjust the movement stroke x of the hydraulic axis, the movement stroke corresponding value is determined by the mounting frame scale line, and construct the corresponding relationship between the movement stroke x of the hydraulic axis and the steady-state pressure p in the high-pressure chamber; S22. Check and clean the ball-type pneumatic valve pressure stabilizing device, process and archive the experimental data, and complete the ball-type pneumatic valve pressure stabilizing test experiment.

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